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Solar Collection Apparatus and Methods Using Accelerometers and Magnetics Sensors

a technology of magnetic sensors and solar collectors, applied in solar heat systems, sustainable buildings, light and heating apparatus, etc., can solve the problem that none of these technologies is widely adopted

Inactive Publication Date: 2011-02-10
SEEKTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]According to another aspect of the present invention, one or more magnetic field sensors are used to sense rotation around an approximately vertical axis and one or more accelerometers are used to sense tilt around an approximately horizontal axis to provide signals indicative of heliostat mirror position in a coordinate system to a control system. The control system allows for precise positioning of a heliostat mirror and the directing of solar energy in a desired direction.
[0008]According to another aspect of the present invention, three orthogonal magnetic field sensors are used to sense rotation around an approximately vertical axis and three orthogonal accelerometers are used to sense tilt around an approximately horizontal axis to provide signals indicative of heliostat mirror position in a coordinate system to a control system. The control system allows for precise positioning of a heliostat mirror and the directing solar energy in a desired direction.

Problems solved by technology

There are many variations of the foregoing devices, but to date, none has been widely adopted due to the complexity, reliability, accuracy and / or expense of the tracking mechanisms.

Method used

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  • Solar Collection Apparatus and Methods Using Accelerometers and Magnetics Sensors
  • Solar Collection Apparatus and Methods Using Accelerometers and Magnetics Sensors
  • Solar Collection Apparatus and Methods Using Accelerometers and Magnetics Sensors

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first embodiment

[0032]FIG. 4 illustrates the present invention that utilizes a flat mirror to heat a target. A solar tracking apparatus has a reflective surface in the form of a mirror 70 for collecting and reflecting incident solar radiation 82 from the Sun 14. The mirror in this embodiment has a planar configuration, although this embodiment could be adapted to use other mirror configurations including parabolic dish, parabolic trough, etc. in order to concentrate the incident solar radiation. The mirror could be conventional silver coated glass, or could be plastic, or could be Mylar® polyester film on a support substrate, or some other form of reflective material that is durable, lightweight and inexpensive.

[0033]The mirror 70 (FIG. 4) is supported by a pair of pivot mechanisms 72 for independent motion about a pair of tilt axes 88 and 90. The pivot mechanisms 72 are mounted atop a support or tower 76. An accelerometer 74 generates signals representative of an amount and direction of motion of ...

second embodiment

[0039]FIG. 5 illustrates the present invention that utilizes an array 104 of individual mirrors 106 to reflect solar radiation 110 through a skylight 102 on the roof of a building 100 to provide internal lighting. This greatly increases the amount of solar radiation otherwise directly entering the interior of the building through the skylight 102 as illustrated by incident light rays 108. The mirrors 106 may each be independently supported and moved as illustrated in FIG. 4 or they may be simultaneously supported and moved by a common tracking system so that reflected light 114 strikes a fixed angle target mirror 112 and is reflected as downwardly projected light 116. The skylight 102 may be of the type sold under the SOLATUBE® trademark which employs a conduit with a highly reflective surface. Optionally a hot mirror 118 may be inserted in to the reflected light transmission path to reflect away the infrared component during the summer to avoid unwanted heating of the interior of t...

embodiment 400

[0049]FIGS. 14-20 illustrate another embodiment of the present invention that utilizes weight-tensioned mechanisms to pivot the mirror. The embodiment 400 includes a planar square mirror 402 whose corners are supported by four cable hook corners 404. A small yoke 406 (FIGS. 15 and 19) has a square surface which is secured to the center of the rear side of the mirror 402 by suitable adhesive. Small yoke 406 is connected for independent rotation about two axes to a tall yoke 408 by a cross piece 410. The base of the tall yoke 408 is secured by screws 412 and nuts 414 (FIG. 19) to a cylindrical cap plate 416. The cylindrical cap plate 416 is mounted on the upper end of a support structure in the form of a hollow vertical support post 418.

[0050]A lower tension wire 420 (FIG. 18) has one end connected to the uppermost cable hook corner 404 and its other end connected to the lowermost cable hook corner 404. An upper tension wire 422 (FIGS. 18 and 19) has an intermediate segment wrapped ar...

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Abstract

A mirror or other reflecting surface is used for collecting and reflecting incident solar radiation. The mirror is supported for independent motion about a pair of axes. An accelerometer generates signals representative of an amount and direction of motion of the mirror about each of the axes. Motors or other drive mechanisms independently drive the mirror about each of the axes. A tracking device provides information about the current position of the Sun. A control is connected to the accelerometer, the motors and the tracking device for maintaining a predetermined optimum orientation of the mirror as the Sun moves across the sky. Position sensors that sense the position of the mirror relative to the earth's magnetic field may also be employed.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a Continuation-in-Part of U.S. application Ser. No. 11 / 763,267 of Mark S. Olsson, filed Jun. 14, 2007.[0002]This application also claims benefit under 35 USC Sections 119(e) and 120 to the filing date of U.S. Provisional Application Ser. No. 60 / 807,456 filed by Mark S. Olsson on Jul. 14, 2006.FIELD OF THE INVENTION[0003]The present invention relates to systems and methods for utilizing the energy of the Sun, and more particularly, to systems and methods for tracking the Sun to re-direct and concentrate incident solar radiation for lighting, heating and photovoltaic applications.BACKGROUND OF THE INVENTION[0004]Increased usage of renewable energy sources such as solar radiation is important in reducing dependence upon foreign sources of oil and decreasing green house gases. Devices have been developed in the past that track the motion of the Sun to re-direct and concentrate incident solar radiation. FIG. 1 illustrates on...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F24J2/40F24J2/38F24S50/20
CPCE04D13/033F24J2/10F24J2/38F24J2/5417H01L31/0547F24J2002/5482Y02B10/20Y02E10/47Y02E10/52F24J2002/5458F24S50/20F24S23/70F24S2030/133F24S2030/15F24S30/45
Inventor OLSSON, MARK S.
Owner SEEKTECH
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